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METAL DRAINAGE CHANNELS; METAL BACK WATER VALVES FOR PREVENTING ENTRANCE OF BACK WATER TO THE SEWAGE SYSTEM OF A BUILDING; METAL BACK WATER VALVES FOR RECEIVING BUILDING WASTE AND PUMPING THE SAME TO THE STREET SIDE OF THE SEWAGE SYSTEM; METAL PIPES; METAL PIPES WITH ACCESS OPENING FOR USE WITH BACK WATER VALVES; METAL DRAIN PIPES; METAL PIPES FOR USE WITH ELECTRIC CABLE PIPES; METAL PIPE CONNECTORS; METAL PIPE BENDS; METAL PIPE SOCKETS; METAL PIPE FITTINGS; METAL GRATINGS; METAL GULLIES, NAMELY, BATHROOM, FLOOR, CEILING, BASEMENT, NON-POTABLE WATER, RAIN WATER AND SEWER GULLIES WITH AND WITHOUT STENCH TRAPS AND BACK-WATER VALVES; METAL VENTILATION SHAFTS AND PARTS THEREOF; METAL DRAINING SHAFTS AND PARTS THEREOF; METAL SHAFTS FOR INSTALLATION IN THE EARTH, USED FOR FOOT TRAFFIC, CABLES, UTILITY CABLES AND INSPECTION PURPOSES; METAL STORAGE TANKS SPECIFICALLY FOR WATER, CHEMICALS AND OTHER LIQUIDS; METAL STORAGE TANKS SPECIFICALLY FOR GREASE, STARCH AND HIGH-VISCOSITY LIQUIDS; SYSTEMS FOR UTILIZING RAIN WATER, COMPRISED PRIMARILY OF A RAIN WATER STORAGE TANK, A MECHANICAL WATER PUMP, A WATER FILTERING UNIT FOR INDUSTRIAL USE, ELECTRONIC CONTROLS FOR OPERATING THE PUMP AND WATER MONITORS FOR MONITORING THE WATER LEVEL IN THE STORAGE TANK

SIPHON PUMPS FOR PUMPING SEWAGE, NON-POTABLE AND RAIN WATER; FLOW SYSTEMS FOR PUMPING SEWAGE, NON-POTABLE WATER AND RAIN WATER, CONSISTING OF A TANK WITH VACUUM OR HIGH-PRESSURE CONVEYORS, WITH OR WITHOUT BACK WATER VALVES, AND WITH FLOAT CONTROL OR WITH ELECTRONIC PROBE CONTROL; PUMPS, NAMELY, MECHANICAL WATER PUMPS AND MECHANICAL SEWAGE PUMPS; GRINDER PUMPS FOR USE IN SEWAGE TREATMENT SYSTEMS

NON-METAL DRAINAGE CHANNELS; NON-METAL BACK WATER VALVES FOR PREVENTING ENTRANCE OF BACK WATER TO THE SEWAGE SYSTEM OF A BUILDING; NON-METAL BACK WATER VALVES FOR RECEIVING BUILDING WASTE AND PUMPING THE SAME TO THE STREET SIDE OF THE SEWAGE SYSTEM; NON-METAL PIPES; NON-METAL PIPES WITH ACCESS OPENING FOR USE WITH BACK WATER VALVES; NON-METAL DRAIN PIPES; NONMETAL PIPES FOR USE WITH ELECTRIC CABLES; NON-METAL PIPE CONNECTORS; NON-METAL PIPE BENDS; NON-METAL PIPE SOCKETS; NON-METAL PIPE FITTINGS; NON-METAL GRATINGS; NON-METAL GULLIES, NAMELY, BATHROOM, FLOOR, CEILING, BASEMENT, NON-POTABLE WATER, RAIN WATER AND SEWER GULLIES WITH AND WITHOUT STENCH TRAPS AND BACK-WATER VALVES; NON-METAL VENTILATION SHAFTS AND PARTS THEREOF; NON-METAL DRAINING SHAFTS AND PARTS THEREOF; NON-METAL SHAFTS FOR INSTALLATION IN THE EARTH, USED FOR FOOT TRAFFIC, CABLES, UTILITY CABLES AND INSPECTION PURPOSES; NON-METAL STORAGE TANKS SPECIFICALLY FOR WATER, CHEMICALS AND OTHER LIQUIDS; NON-METAL STORAGE TANKS SPECIFICALLY FOR GREASE, STARCH AND HIGH-VISCOSITY LIQUIDS